Distributed Databases
Which of the following is true concerning a global transaction?

The required data are at one local site and the distributed DBMS routes requests as necessary.
The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS.
The required data are at one local site and the distributed DBMS passes the request to only the local DBMS.
The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary.

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Distributed Databases
Which of the following is a disadvantage of replication?

Each site must have the same storage capacity.
Each transaction may proceed without coordination across the network.
If the database fails at one site, a copy can be located at another site.
Reduced network traffic

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